Guest Stars Katie Boland as Clarissa Anna Walton as Diane de Poitiers Ashley Charles as Colin McPhail Ali Lyons as Rose Eleanor Methven as Abbess Lola Tash as Natalia Caoimhe O'Malley as Princess Elizabeth Jordan Lee as King Philip II Co Starring Declan M. Moran as Wedding Musician Joe Taylor as Black Robed Bishop Michelle Read as Queen's Emissary Sophie O'Brien as 7 Year Old Mary Sean Treacy as 7 Year Old Francis